415 lines
10 KiB
C
415 lines
10 KiB
C
/*-
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* Copyright (c) 2005
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* Bill Paul <wpaul@windriver.com>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This file implements a small portion of the Winpcap API for the
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* Windows NDIS interface in wpa_supplicant. It provides just enough
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* routines to fool wpa_supplicant into thinking it's really running
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* in a Windows environment.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/sysctl.h>
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#include <sys/fcntl.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_var.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <net/route.h>
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#include <net80211/ieee80211_ioctl.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <pcap.h>
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#include "Packet32.h"
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#define OID_802_11_ADD_KEY 0x0d01011D
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typedef ULONGLONG NDIS_802_11_KEY_RSC;
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typedef UCHAR NDIS_802_11_MAC_ADDRESS[6];
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typedef struct NDIS_802_11_KEY {
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ULONG Length;
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ULONG KeyIndex;
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ULONG KeyLength;
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NDIS_802_11_MAC_ADDRESS BSSID;
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NDIS_802_11_KEY_RSC KeyRSC;
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UCHAR KeyMaterial[1];
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} NDIS_802_11_KEY;
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typedef struct NDIS_802_11_KEY_COMPAT {
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ULONG Length;
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ULONG KeyIndex;
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ULONG KeyLength;
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NDIS_802_11_MAC_ADDRESS BSSID;
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UCHAR Pad[6]; /* Make struct layout match Windows. */
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NDIS_802_11_KEY_RSC KeyRSC;
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#ifdef notdef
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UCHAR KeyMaterial[1];
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#endif
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} NDIS_802_11_KEY_COMPAT;
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#define TRUE 1
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#define FALSE 0
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struct adapter {
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int socket;
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char name[IFNAMSIZ];
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int prev_roaming;
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};
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PCHAR
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PacketGetVersion(void)
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{
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return("FreeBSD WinPcap compatibility shim v1.0");
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}
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void *
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PacketOpenAdapter(CHAR *iface)
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{
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struct adapter *a;
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int s;
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int ifflags;
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struct ifreq ifr;
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struct ieee80211req ireq;
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s = socket(PF_INET, SOCK_DGRAM, 0);
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if (s == -1)
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return(NULL);
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a = malloc(sizeof(struct adapter));
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if (a == NULL)
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return(NULL);
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a->socket = s;
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if (strncmp(iface, "\\Device\\NPF_", 12) == 0)
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iface += 12;
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else if (strncmp(iface, "\\DEVICE\\", 8) == 0)
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iface += 8;
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snprintf(a->name, IFNAMSIZ, "%s", iface);
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/* Turn off net80211 roaming */
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bzero((char *)&ireq, sizeof(ireq));
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strncpy(ireq.i_name, iface, sizeof (ifr.ifr_name));
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ireq.i_type = IEEE80211_IOC_ROAMING;
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if (ioctl(a->socket, SIOCG80211, &ireq) == 0) {
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a->prev_roaming = ireq.i_val;
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ireq.i_val = IEEE80211_ROAMING_MANUAL;
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if (ioctl(a->socket, SIOCS80211, &ireq) < 0)
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fprintf(stderr,
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"Could not set IEEE80211_ROAMING_MANUAL\n");
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}
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bzero((char *)&ifr, sizeof(ifr));
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strncpy(ifr.ifr_name, iface, sizeof (ifr.ifr_name));
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if (ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
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free(a);
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close(s);
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return(NULL);
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}
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ifr.ifr_flags |= IFF_UP;
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if (ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
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free(a);
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close(s);
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return(NULL);
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}
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return(a);
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}
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int
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PacketRequest(void *iface, BOOLEAN set, PACKET_OID_DATA *oid)
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{
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struct adapter *a;
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uint32_t retval;
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struct ifreq ifr;
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NDIS_802_11_KEY *old;
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NDIS_802_11_KEY_COMPAT *new;
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PACKET_OID_DATA *o = NULL;
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if (iface == NULL)
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return(-1);
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a = iface;
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bzero((char *)&ifr, sizeof(ifr));
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/*
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* This hack is necessary to work around a difference
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* betwee the GNU C and Microsoft C compilers. The NDIS_802_11_KEY
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* structure has a uint64_t in it, right after an array of
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* chars. The Microsoft compiler inserts padding right before
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* the 64-bit value to align it on a 64-bit boundary, but
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* GCC only aligns it on a 32-bit boundary. Trying to pass
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* the GCC-formatted structure to an NDIS binary driver
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* fails because some of the fields appear to be at the
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* wrong offsets.
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*
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* To get around this, if we detect someone is trying to do
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* a set operation on OID_802_11_ADD_KEY, we shuffle the data
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* into a properly padded structure and pass that into the
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* driver instead. This allows the driver_ndis.c code supplied
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* with wpa_supplicant to work unmodified.
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*/
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if (set == TRUE && oid->Oid == OID_802_11_ADD_KEY) {
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old = (NDIS_802_11_KEY *)&oid->Data;
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o = malloc(sizeof(PACKET_OID_DATA) +
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sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
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if (o == NULL)
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return(0);
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bzero((char *)o, sizeof(PACKET_OID_DATA) +
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sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength);
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o->Oid = oid->Oid;
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o->Length = sizeof(NDIS_802_11_KEY_COMPAT) + old->KeyLength;
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new = (NDIS_802_11_KEY_COMPAT *)&o->Data;
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new->KeyRSC = old->KeyRSC;
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new->Length = o->Length;
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new->KeyIndex = old->KeyIndex;
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new->KeyLength = old->KeyLength;
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bcopy(old->BSSID, new->BSSID, sizeof(NDIS_802_11_MAC_ADDRESS));
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bcopy(old->KeyMaterial, (char *)new +
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sizeof(NDIS_802_11_KEY_COMPAT), new->KeyLength);
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ifr.ifr_data = (caddr_t)o;
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} else
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ifr.ifr_data = (caddr_t)oid;
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strlcpy(ifr.ifr_name, a->name, sizeof(ifr.ifr_name));
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if (set == TRUE)
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retval = ioctl(a->socket, SIOCSDRVSPEC, &ifr);
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else
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retval = ioctl(a->socket, SIOCGDRVSPEC, &ifr);
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if (o != NULL)
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free(o);
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if (retval)
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return(0);
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return(1);
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}
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int
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PacketGetAdapterNames(CHAR *namelist, ULONG *len)
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{
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int mib[6];
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size_t needed;
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struct if_msghdr *ifm;
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struct sockaddr_dl *sdl;
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char *buf, *lim, *next;
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char *plist;
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int spc;
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int i, ifcnt = 0;
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plist = namelist;
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spc = 0;
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bzero(plist, *len);
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needed = 0;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0; /* protocol */
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mib[3] = 0; /* wildcard address family */
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mib[4] = NET_RT_IFLIST;
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mib[5] = 0; /* no flags */
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if (sysctl (mib, 6, NULL, &needed, NULL, 0) < 0)
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return(FALSE);
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buf = malloc (needed);
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if (buf == NULL)
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return(FALSE);
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if (sysctl (mib, 6, buf, &needed, NULL, 0) < 0) {
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free(buf);
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return(FALSE);
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}
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lim = buf + needed;
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/* Generate interface name list. */
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next = buf;
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while (next < lim) {
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type == RTM_IFINFO) {
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sdl = (struct sockaddr_dl *)(ifm + 1);
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if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
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if ((spc + sdl->sdl_nlen) > *len) {
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free(buf);
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return(FALSE);
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}
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strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
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plist += (sdl->sdl_nlen + 1);
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spc += (sdl->sdl_nlen + 1);
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ifcnt++;
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}
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}
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next += ifm->ifm_msglen;
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}
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/* Insert an extra "" as a spacer */
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plist++;
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spc++;
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/*
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* Now generate the interface description list. There
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* must be a unique description for each interface, and
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* they have to match what the ndis_events program will
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* feed in later. To keep this simple, we just repeat
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* the interface list over again.
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*/
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next = buf;
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while (next < lim) {
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type == RTM_IFINFO) {
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sdl = (struct sockaddr_dl *)(ifm + 1);
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if (strnstr(sdl->sdl_data, "wlan", sdl->sdl_nlen)) {
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if ((spc + sdl->sdl_nlen) > *len) {
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free(buf);
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return(FALSE);
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}
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strncpy(plist, sdl->sdl_data, sdl->sdl_nlen);
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plist += (sdl->sdl_nlen + 1);
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spc += (sdl->sdl_nlen + 1);
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ifcnt++;
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}
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}
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next += ifm->ifm_msglen;
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}
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free (buf);
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*len = spc + 1;
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return(TRUE);
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}
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void
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PacketCloseAdapter(void *iface)
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{
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struct adapter *a;
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struct ifreq ifr;
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struct ieee80211req ireq;
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if (iface == NULL)
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return;
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a = iface;
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/* Reset net80211 roaming */
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bzero((char *)&ireq, sizeof(ireq));
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strncpy(ireq.i_name, a->name, sizeof (ifr.ifr_name));
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ireq.i_type = IEEE80211_IOC_ROAMING;
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ireq.i_val = a->prev_roaming;
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ioctl(a->socket, SIOCS80211, &ireq);
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bzero((char *)&ifr, sizeof(ifr));
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strncpy(ifr.ifr_name, a->name, sizeof (ifr.ifr_name));
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ioctl(a->socket, SIOCGIFFLAGS, (caddr_t)&ifr);
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ifr.ifr_flags &= ~IFF_UP;
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ioctl(a->socket, SIOCSIFFLAGS, (caddr_t)&ifr);
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close(a->socket);
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free(a);
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return;
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}
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#if __FreeBSD_version < 600000
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/*
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* The version of libpcap in FreeBSD 5.2.1 doesn't have these routines.
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* Call me insane if you will, but I still run 5.2.1 on my laptop, and
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* I'd like to use WPA there.
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*/
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int
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pcap_get_selectable_fd(pcap_t *p)
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{
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return(pcap_fileno(p));
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}
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/*
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* The old version of libpcap opens its BPF descriptor in read-only
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* mode. We need to temporarily create a new one we can write to.
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*/
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int
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pcap_inject(pcap_t *p, const void *buf, size_t len)
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{
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int fd;
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int res, n = 0;
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char device[sizeof "/dev/bpf0000000000"];
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struct ifreq ifr;
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/*
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* Go through all the minors and find one that isn't in use.
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*/
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do {
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(void)snprintf(device, sizeof(device), "/dev/bpf%d", n++);
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fd = open(device, O_RDWR);
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} while (fd < 0 && errno == EBUSY);
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if (fd == -1)
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return(-1);
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bzero((char *)&ifr, sizeof(ifr));
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ioctl(pcap_fileno(p), BIOCGETIF, (caddr_t)&ifr);
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ioctl(fd, BIOCSETIF, (caddr_t)&ifr);
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res = write(fd, buf, len);
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close(fd);
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return(res);
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}
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#endif
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